Cushion for a respiratory mask



FIG. 1 is a front perspective view of a cushion for respiratory mask showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The broken lines in the drawings illustrate portions of the cushion for respiratory mask that form no part of the claimed design. 

CLAIM The ornamental design for a cushion for respiratory mask, as shown. 